%% Artigo para COBEM 2011 %%
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%% Joaquim Neto Dias
%% Gustavo Oliveira Violato 
%% Cristiane Aparecida Martins


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\title{DYNAMIC MODEL OF A TWO-STROKE GLOW ENGINE FROM EXPERIMENTAL DATA}
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\authors{Joaquim Neto Dias, joukend@gmail.com} \\
\authors{Gustavo Oliveira Violato, gustavoviolato@gmail.com} \\
\authors{Cristiane Aparecida Martins, cmartins@ita.br} \\
\institution{Instituto Tecnol\'ogico de Aeron\'autica - ITA Pra\c{c}a Marechal Eduardo Gomes, 50 - Vila das Ac\'acias
CEP 12.228-900 - S\~ao Jos\'e dos Campos - SP - Brasil} \\
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\abstract{\textbf{Abstract.} In the present work, the main objective was to experimentally obtain the most representative linear dynamic model of a two-stroke piston engine for small Unmanned Aerial Vehicle (UAV) applications with low-cost sensors and a friendly, LabView$^{\textregistered}$-based interface. The engine was mounted on a test bed equipped to measure thrust and rotational speed. The throttle lever was actuated on by a standard hobby servo motor, which controlled the carburetor's valve opening. Input command and data acquisition were performed in a two-layer approach: low-cost hardware, where a micro-controller unit managed the sensor's readings, servo input and external communications through serial protocol; and LabView for command signal generation, serial port write/read, data processing and other high-level tasks. The motor dynamics, represented by its transfer function, was obtained by minimizing the output error between the experimental responses to various types of input signal and that obtained by the simulation of a fixed topology, fixed order reference model that included the servo and engine models in series.}\\
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\keywords{\textbf{Keywords:} dynamic model, experimental, glow engine, two-stroke, parameter estimation, systems identification}\\
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\input{introduction.tex}
\input{theengine.tex}
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\section{ACKNOWLEDGEMENTS}
The authors would like to thank Mr. Ronaldo da Silva Menezes for the invaluable help with fabricating some of the hardware used for the motor bench, Mr. Marcelo  Guedes for the useful tips with the electronics and Mr. F\'abio Andrade de Almeida, for the fruitful discussions and helpful ideas provided during the course of this work. 

\section{REFERENCES}

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\section{Responsibility notice}

The authors are the only responsible for the printed material included in this paper.

%%% ===== MACACO PARA AS FIGURAS E TABELAS ==== %%

%\begin{figure}[h!]
%\centering
%\includegraphics[angle=0, scale=1]{figure.jpg}
%\caption{Diagram of shear modulus versus frequency at 303 K}
%\label{fig1}
%\end{figure}

%\begin{table}[!h]
%\centering
%\caption{Experimental results for flexural properties of CFRC-4HS and CFRC-TWILL composites. \protect\\Span/depth ratio = 35:1. Average results of 7 specimens.}
%\begin{tabular}{|c|c|c|}
%\hline
%Composite Properties & CFRC-TWILL & CFRC-4HS\\
%\hline
%Flexural Strength (MPa)$^{(1)}$ & 209$\pm$ 10 & 180 $\pm$  15\\
%\hline
%Flexural Modulus (GPa)$^{(1)}$ & 57.0 $\pm$ 2.8 & 18.0 $\pm$  1.3\\
%\hline
%Mid-span deflection at the failure stress (mm) & 2.15 $\pm$  1.90 & 6.40 $\pm$  0.25\\
%\hline
%\end{tabular}
%\\
%\begin{tabular}{p{11cm}ll}
%$^{(1)}$: measured at 25$^{o}$C & &
%\end{tabular}
%\label{tab1}
%\end{table}

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